package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * @author hyh
 * @version 1.0
 */
@Slf4j
@SuppressWarnings({"all"})
@Service
public class UserServiceImpl implements UserService {

    private static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
    private static final String GRANT_TYPE = "authorization_code";

    @Autowired
    WeChatProperties weChatProperties;
    @Autowired
    UserMapper userMapper;


    /**
     * 通过code来得到用户
     *
     * @param userLoginDTO
     * @return
     */
    @Override
    public User userLogin(UserLoginDTO userLoginDTO) {
        //发送请求
        Map<String, String> map = new HashMap<>();
        //设置请求参数 appid secret js_code grant_type
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", userLoginDTO.getCode());
        map.put("grant_type", GRANT_TYPE);
        //得到一个json数据包，将其转成json格式方便调用其中的字段
        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        //通过JSON.parseObject(json)转成jsonObject对象
        JSONObject jsonObject = JSON.parseObject(json);
        //得到openid
        String openid = jsonObject.getString("openid");
        //判断openid是否为空
        if (openid == null) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断是否为新的用户需要查user表
        User user = userMapper.selectByOpenid(openid);
        if (user == null) {
            user = user.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        return user;
    }
}
